FEM: remove trailing whitespace

src/Mod/Fem/femtest/data/elmer/group_mesh.geo

@@ -51,7 +51,7 @@ Save "/tmp/tmpjVhNNb.unv";
 // Gmsh documentation:
 // https://gmsh.info/doc/texinfo/gmsh.html#Mesh
 //
-// We do not check if something went wrong, like negative jacobians etc. You can run Gmsh manually yourself: 
+// We do not check if something went wrong, like negative jacobians etc. You can run Gmsh manually yourself:
 //
 // to see full Gmsh log, run in bash:
 // /usr/bin/gmsh - /tmp/tmputZ_uU.geo

src/Mod/Fem/femtest/test_information.md

@@ -2,7 +2,7 @@
 
 With these files one can find information on how to run unit tests for FEM
 
-## Specifically 
+## Specifically
 
 - How to run a specific test class or a test method see file: `src/Mod/Test/__init__`
 - related [forum thread](https://forum.freecadweb.org/viewtopic.php?f=10&t=22190#p175546)
@@ -123,7 +123,7 @@ unittest.TextTestRunner().run(alltest)
 ```
 
 
-## Open files 
+## Open files
 
 ### From FEM test suite source code